Sawyer s gage for saw-mills



(No Model.)

H. A. DUNCAN. SAWYERS GAG-E FOR SAW MILLS.

No. 425,373. Patented Apr. 8, 1890.

- each board or piece of timber to be sawed.

' ATENT rricn.

HANSFORD A. DUNCAN, OF GRACEW'OOD, GEORGIA.

SAWYERS GAGE FOR SAW-MILLS.

SPECIFICATION forming part of Letters Application filed July 25, 1889.

To all whom it may concern:

Be it known that I, HANSFORD AUGUSTINE DUNCAN, a citizen of the United States, and a resident of Gracewood, county of Richmond, State of Georgia, have invented new and usefullmprovements in Sawyers Gages for Saw- Mills, of which the following is a full and exact description, reference being had to the accompanying drawings, making part of this specification.

This invention is intended to be bolted or otherwise secured to the forward part of a saw-mill frame or bed-plate.

Its object is to provide ineansby which any person may be enabled to saw lumber correctly. It takes the place of the ordinary roller, and without any material increase of friction insures a correct guide and gage for The nature of the invention will be readily understood by referring to the accompanying drawings, wherein- Figure 1 represents a plan or top view of the device; Fig. 2, a vertical longitudinal section through the line a: w thereof; Fig. 3, a perspective view of my device applied to an ordinary circular-saw mill, as in the practical operation of same. b

On the drawings, the letter A designates a metallic bed or frame, provided at its rear with side bearings 11 b, forzreceiving the journals c c of a roller D, upon which rests that edge of the timber or stick which projects over the ends of the carriage head-blocks.

The front edges of the bearings are each formed at an incline, and have secured thereupon the ends of a scale E, so that the divisions and figures thereof may at all times be clearly visible to the operator.

That portion of the frame A which is in front of the scale is provided with numerous vertical holes f It, all of an equal diameter, and Iadapted to receive the lower end of a pin The pin I is provided at a certain distance from its lower end with a collar 1, to prevent its dropping through the plate, as well as to form a rest for the lower end of a sleeve L, that is loosely fitted over the upper portion of the pin to reduce the amount of friction thereupon.

The holes fare formed near that edge of Patent No. 425,373, dated April 8, 1890.

Serial No. 318,627. (No model.)

holding reserve pins for substitution in case of accident to or loss of the main pin.

The holes 71- are preferably arranged, as shown in the drawings, in rows parallel with the roller D, and the distances between the centers of the holes in each row are equal. Each succeeding row is, however, arranged at a greater distance from the saw side of the frame, so as to cause to be in diagonal lines therewith and equally spaced between one of their end holes and the adjacent end hole of the diagonal line next thereto.

On the drawings the aforesaid holes are arranged atdistances of one-quarter inch apart, (according to the scale shown thereon,) and the device to gage from a one-half-inch plank to a five-and-one-quarter-inch board or piece of timber, the hole in the row nearest the roller and next the saw-mill side of the device being for the purpose of holding the pin and sleeve to gage a one-half-inch plank, the hole next thereto in the second row a threequarter-inch plank, the next in diagonal row a one-inch plank, and the last in the said row a one-and-one-half-inch plank. The second hole in the first row, or row next the roller, is

. gaged for a on e-and-three-quarter-inch plank,

the gage increasing in each diagonal row at the rate of one-quarterinch per hole until the limit is reached.

The gage-holes It may be of any desired form, their relative arrangement changed,

and their number be increased or diminished without departing from the spirit of this invention.

In the application of my invention to a sawmill for practical operation therewith the device is secured to the mill bed-plate or frame by bolts Z or other suitable means, and the pin I, with sleeve thereon, placed at rest in one of the holes f while the saw is removing a slab from a log or while squaring the same.

After the log is squared the aforesaid pin is placed in the requisite hole h to gage the desired thickness of board or timber. The head blocks are then operated in the usual manner to bring the log against the pin, or rather sleeve thereof, and the mill started. The pin the holes of-said rows prevents the buckling or bending of the log from the carriage gtoWard the saw, and thus insures a uniform and correct cut, the headbloc-ks of the carriage serving to hold the log 5 in the opposite direction' Having described my invention, What I claim as new, and desire to secure by Letters Patent, is

In a sawyers gage, the combination of a IO gage-plate having a roller journaled at one end thereof, a scale arranged in front of theroller, a series of vertical holes in front of the scale, and a pin adapted to fit the said holes, substantially as and for the purpose set forth.

In testimony whereof I affix mysignature in 1 the presence of two witnesses.

H. A. DUNCAN. Witnesses:

W. D. TANT, E. J. ONEILL. 

